Tactory Sepanggar, roduc particular brand of Portland cement using limestone, kaolinite and sand. The three raw materials are pre-calcined at 950°C, which drives off any carbon dioxide and water chemically with the minerals. The bulk oxide composition of the calcined materials is as follows: Cao SiO2 SiO2 Limestone 100% 45%; 80%; Al2O3 : 55% Fe203 : 20% Kaolinite Sand The bulk oxide composition of the resulting clinker is:

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A cement factory in Teluk Sepanggar, Kota Kinabalu Sabah has produced a
particular brand of Portland cement using limestone, kaolinite and sand. The
three raw materials are pre-calcined at 950°C, which drives off any carbon
dioxide and water chemically with the minerals. The bulk oxide composition of
the calcined materials is as follows:
Limestone
Kaolinite
Sand
Сао
100%
SIO2 45%;
SiO2 80%;
Al203 : 55%
Fe,03 : 20%
The bulk oxide composition of the resulting clinker is:
Oxide
Сао
Table 1.0 Bulk oxide composition
% mass
66.4
Molecular weight
56
SiO2
Al2O3
Fe2O3
23.1
60
5.3
4.0
102
160
The free lime content of the clinker is 1.2% (molecular weight = 80), and
if gypsum has not yet been added, what proportions of the four main
cement compounds are potentially present? Your answer should be given
to one decimal place.
а.
b.
How much sand is used as a percentage of the total mass calcined raw
materials?
Transcribed Image Text:A cement factory in Teluk Sepanggar, Kota Kinabalu Sabah has produced a particular brand of Portland cement using limestone, kaolinite and sand. The three raw materials are pre-calcined at 950°C, which drives off any carbon dioxide and water chemically with the minerals. The bulk oxide composition of the calcined materials is as follows: Limestone Kaolinite Sand Сао 100% SIO2 45%; SiO2 80%; Al203 : 55% Fe,03 : 20% The bulk oxide composition of the resulting clinker is: Oxide Сао Table 1.0 Bulk oxide composition % mass 66.4 Molecular weight 56 SiO2 Al2O3 Fe2O3 23.1 60 5.3 4.0 102 160 The free lime content of the clinker is 1.2% (molecular weight = 80), and if gypsum has not yet been added, what proportions of the four main cement compounds are potentially present? Your answer should be given to one decimal place. а. b. How much sand is used as a percentage of the total mass calcined raw materials?
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